12 Letter Words Starting with O and Containing ESS

When you need a list of 12 letter words that start with O and contain ESS, who you gonna call? WordList Finder! Word lists exactly like these 12 letter words are only a few quick finger taps away on our site. Dive into words that start with O or words with ESS to find some more options — if you're feeling a little flexible.

12 letter words

  1. oafishnesses
  2. objectlessly
  3. obsessionist
  4. occultnesses
  5. odiousnesses
  6. offishnesses
  7. oiltightness
  8. omissiveness
  9. opaquenesses
  10. oracularness
  11. ornatenesses
  12. ornerinesses
  13. otiosenesses
  14. outdatedness
  15. overfineness
  16. overpressing
  17. overrashness
  18. owlishnesses